Sheet-metal cutting and shaping machine.



PATENTED MAE. 24, 190s'.

. A G. o. MOTTE'. SHEET METAL GUTTING AND SEATING MACHINE.

APPLIOATION FILED NOV. 3, 1902.

5 SHEETS-SHEET 1 H0 MOD E L Nain-mulini INIINIILIJLII||||HMMnwymmu EATENTEUMAE. 24, 1903.

3. 3. MoEE. l SHEET METAL GETTING ANDSHAPING MAGE-INE.

APPLICATION FILED NOV. 3, 1902.

N0 MODEL.

WN NQ 3m E 3 Tu: nonms PETERS co., mow-uma., wnsnlns'lon, D4 c4 PATENTED MAR. 24, 1903.

G. 0. MOHR.

SHEET METAL CUTTING AND SHAPING MACHINE.

APPLICATION FILED NOV. 3, 1902.

5 SHEETS-SHEET a.

NO MODEL.

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EATENTED MAE. 24, 1903..

Nofvzsnoa.

, l E.' 0; MoEE. SEEEE.1 METAL CUTTING AND SEAPING MACHINE.

APPLIOATION FILED NOU. 3, 1902,

5 SHEETS-SHEET 4.

N0 MODEL.

No. 723,703. PATENTED MAE. 244, v1903.v

G. G. MQEE. y SHEET METAL GETTING AND SEATING MACHINE.

APPLIGATIGN FILED Nov.-a, 1902. l No'nonEL. VG SHEETS-SHEET 5. A

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UNrrnn 'STATES ATENT OFFICE.

GUSTAVE C.MOHR, OF ST. LOUIS, MISSOURI, ASSIGNOR TO HEMP AND COM- PANY, OF'ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

SHEET-METAL CUTTING vA-ND SHAPING MACHINE.

SPECIFICATION forming part of Letters Patent N o. 723,703, dated March 24, 1903.

` Application filed November 3, 1902. Serial No. 129,988. (No model.)

T0 all whom, it may concern.-

Be it known that I, GUsTAvE'C. MOHR, of the city of St. Louis, State of Missouri, have invented certain new and useful Improvements in Sheet-Metal Cutting and Shaping Machines, of which the following is a full, clear, and exactd'escription, reference being had to the accompanying drawings, forming a part hereof.

This invention relates to improvements in a sheet-metal cutting and shaping machine; and it consists of the novel construction, combination, and arrangement of parts hereinafter shown, described, and claimed.

The object of this invention is to construct a machine whereby sheet Ametal may be cut into plates of various shapes.

Figure 1 is a side elevation of my complete invention. Fig. 2 is a top plan View of the same. Fig. 3 is a top plan view ot the turning and clamping device, the different posi tions to which it maybe adjusted being shown in dotted lines. Fig. 4 is a side elevation of the same with parts in section, showing the construction. Fig. 5 is a cross-sectional View taken on the line 5 5 of Fig. 4. Fig. 6 is a cross-sectional view taken on the line 6 6 of Fig. 4. Fig. 7 is a detail horizontal sectional view taken on the line 7'7 of Fig. 4. Fig. 8 is a detail plan View of a modified form of guide used for shaping the plates. Figs. 9, 10, 1l, and 12 are views of the various-shaped plates cutloy my invention.

In the construction of the device as shown I provide a base or support 13, which is suitably mounted upon a trestle 14. A portion of the base 13 is provided with anges 15, forming a suitable guideway wherein the setbar 16 is adjusted and rigidly held at its adjustment by the set-screw 17. The base 13 and the trestle 14 are provided with suitable slots 18 and 19 for the movement of the setscrew longitudinally. The set-bar 16 is provided wivth a slot 20, in which is guided the pivotpost 21 of the supporting-yoke 22. Upon the set-bar is located a supporting-plate 23, upon which one end of the yoke 22 is supported, said plate being of sufcient size to allow for the circular motion imparted to the yoke by the action of the guide hereinafter fully described. The yoke is held in a vertical position by means of the shoe 24. The lower arm of the yoke 22 is provided with a removablepivot 25, upon which is mount-ed a clampingfjaw 26. A correspondingjaw 27is 55 pivoted toa spring-actuated bolt 2.8,l1eld in a socket29,formedon the upperendoftheyoke. The upper jaw 27 isV raised and lowered by means of the locking-lever 30, located upon the top of the yoke, (causing the set-screw 3l 6o Y to come in contact with the spring-actuated bolt 28,) and is released in a reverse manner. The ends ot` the jaw 26 are provided with a tooth 32 and are received by the notches 33, formed in the ends of the upper jaw. This is for the purpose of firmly clamping thesheet of metal and preventing lateral motion. The lower jaw is also provided with trunnions 34, located equidistant from the center pivot 25 and are to pass through the groove 35, formed 7o on the guide-plate 36, which is suitably mounted upon a frame 37 and carried by the set-bar. Upon the guide-plate is fulcrumed alever 38, having at its center projecting teeth 39' and extending into the slot for alternately 75 stopping and supporting the trunnion 34. The free end of the lever 38 is provided with an arm 39, its end being provided with a recess 40, the said arm 39 projecting into the groove 35 at its entrance. The lever 38 and 8o arm 39 are normally held in a locked position by the coil-spring 41.

rllhe sheet metal is cut by the ordinary rotary shears 42, which are mounted upon one end of the base 13.

The operation of my invention is as follows: The jaws are rst placed in position, as shown in Fig. 2, in alinement with the rotary cuttingshears, the one trunnion of the lower jaw being placed in the slot between the teeth 39 9o of the lever 38. The sheet metal is then placed between the jaws and is located centrally by means of the gage 43. The device is then adjusted according to the size of sheet to be cnt by manipulation of the set-screw 17. The rotary shears are then operated, and by cutting the sheet metal it will automatically feed itself and will cause the jaws and yoke to follow -in the position as shown' by dotted lines a in Fig. 3 until theopposite loo trunnion of the lower jaw comes in contact with the recess 40 of the arm 39, pressing the the clamping-jaws serving as pivots alternately while the semicircular ends of the sheet are cut, the groove itself governing the form of the intermediate portions of the shape. By referring to Fig. 3 it will be observed that the various positions the device assumes are indicated by dotted lines.

By substituting differently-shaped guideplates and other jaws with trunnions differently located various shapes may be cnt. For example, a few of the dierent-shaped plates are shown in Figs. 9, IO, 11, and 12. guide-plate shown in Figs. 2 and 3 a plate as shown in Fig. 10 is cut, and by the guideplate shown in Fig. 8 a plate as shown in Fig. 9 is cut. By varying the shape of the groove a perfect oval or ellipse can be cut, which is preferably designed for wood-stoves, minnowbuckets, and the like.

By removing the frame 37 and bolting the shoe to the set-bar the machine becomes an eiiicient circle-cutter.

I claim- 1. A machine for cutting and shaping sheet metal, comprising a pair of rotary shears; clamping-jaws pivotally carried by a yoke; trunnions carried by said jaws; and a guideplate for receiving the trunnions and guiding the jaws and sheet met-al while cutting, substantially as specified.

By the' 2. A device of the class described, com-a prising a set-bar adjustably mounted within a base; a yoke pivotally and slidingly mounted upon said set-bar; clamping-jaws pivotally carried by said yoke; a guide-plate carried by the set-bar; trunnions formed on one of said jaws and adapted to operate upon said guide-plate; and means for retaining and releasing said trnnnions to permit the rotation of the clamps and sheet metal while cutting, substantially as specified.

3. A device of the class described, comprising a set-bar adjustably mounted within a base; a yoke pivotally and slidingly mounti ed upon said set-bar; clamping-jaws pivotally carried by said yoke; means for opening and closing said jaws; a guide-plate carried by said set-bar; trunnions carried by one of said jaws and adapted to pass within the groove of the guide-plate; and a toothed le- Ver carried by said guide-plate and arranged to hold one of said trunnions while acting as a pivot, and to release said trunnion by the action of the second trunnion, said retaining and releasing mechanism being operated automatically during the cutting of the material, substantially as specied.

4. A device of the class described, comprising a pair of jaws pivotally mounted Within a frame; trunnions carried by one of said jaws, said trunnions at times acting as pivots, and while in their travel serving to shape the material into the required design; and means for automatically retaining and releasing said trunnions, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

GUS'IAVE C. MOI'IR.

/Vitnesses:

M. G. IaIoN, ALFRED A. EICKs. 

